How long can wood frogs stay frozen for?

They don't actually freeze. As they cool down their blood vessels expand. Their cells fill with glucose and the water is transported into the vessels. Their skin freezes, and then their blood. But the cells themselves are not frozen, they are filled with a thick glucose syrup and their metabolism stops. read more

They don't actually freeze. As they cool down their blood vessels expand. Their cells fill with glucose and the water is transported into the vessels. Their skin freezes, and then their blood. read more

The wood frog of Alaska spends nearly seven months a year in a frozen state, according to a new study. (Uwe Anders) Each September, the wood frogs of Alaska do a very strange thing: They freeze. read more

Frogs can survive all winter like this, undergoing cycles of freezing and thawing. If it gets too cold, though, they’ll die. Frogs in Ohio, in Costanzo’s neck of the woods, can survive about 24 degrees Fahrenheit. read more